Fiber finishes

An aqueous composition useful as a fiber finish for polypropylene fibers, filaments and yarns, said aqueous composition being essentially a clear liquid homogeneous solution having a 25.degree. C. knematic viscosity from about 100 to 200 centistokes, consisting essentially of:

• (a) 30 to 90 weight percent .alpha.-alkyl-.OMEGA.-hydroxypoly (oxyethyl-ene) produced by condensation of 1 mole of C.sub.11-15 straight-chain randomly substituted secondary alcohols with an average of 7 to 20 moles of ethylene oxide;
• (b) 5 to 60 weight percent ethoxylated alcohol phosphate ester selected from the group consisting of .alpha.-dodecyl-.OMEGA.-hydroxypoly(oxyethyl-ene) mixture of dihydrogen phosphate and monohydrogen phosphate esters that have an acid number to pH 5.2 of 103-111 and that are produced by the esterification of the condensation product of 1 mole of n-dodecyl alcohol with 4-4.5 moles of ethylene oxide and .alpha.-tridecyl-.OMEGA.-hydroxypoly(oxyethyl-ene) mixture of dihydrogen phosphate and monohydrogen phosphate esters that have an acid number to pH 5.2 of 75-85 and that are produced by the esterification of the condensation product of one mole of "oxo" process tridecyl alcohol with 5.5-6.5 moles of ethylene oxide, and neutralized with essentially a stoichiometric amount of potassium hydroxide;
• and
• (c) 0.5 to 25 weight percent water.